1913-14.] Curvatures of the Tasmanian Aboriginal Cranium. 135 
with Table I. As in Table I., No. 48 of Berry and Robertsons Atlas 
is omitted from the final results, as it is known to be a juvenile. 
For comparative purposes I have recorded the same twelve observations 
on forty Australian aboriginal crania. The resulting figures are set forth 
in Table III., in precisely the same manner as those for the Tasmanian in 
Table II. 
In the Australian table I have also included eleven crania from Klaatsch’s 
work, and the entire table thus deals with fifty-one Australian crania, i.e. 
with precisely the same number as there are Tasmanians. 
The source of my own forty original Australian crania is Berry and 
Robertson s“ Dioptrographic Tracings in three Normse of Ninety Australian 
Crania ” (26), now in the press. As only forty of the original drawings 
have as yet been returned from the printer, it was not possible for me to 
utilise the whole ninety. For permission to avail myself of this work 
I have to thank Professor Berry and Dr Robertson. My Australian 
material will eventually be found, therefore, to include plates numbered 
1 to 40, norma A, of the atlas of tracings just referred to. The whole of 
this series of Australian crania is quite new, and has not previously been 
recorded scientifically. 
The indices of curvature of the several segments of the median sagittal 
curve of the fifty-one Tasmanian and fifty-one Australian crania may be 
summarised and compared with certain selected objects recorded by Klaatsch, 
as follow : — 
Curvature index of glabello-bregmatic curve of the os frontale : — 
1 Pithecanthropus erectus (Klaatsch) 
3 Spy-Neanderthal (Klaatsch) . 
51 Australians (Klaatsch and Buchner) 
51 Tasmanians (Buchner) . 
7*53 
133 
181 
18*7 
As Klaatsch’s index of curvature expresses the ratio which the length 
of the greatest distance of the arc from the chord bears to the length of 
the chord, the latter being taken as 100, it follows from the above that the 
Tasmanian possesses the most highly curved glabello-bregmatic arc of any 
of the objects compared. 
The curvature index of the os parietale, as worked out by Klaatsch’s 
method, and compared with the same objects as before, is as follows : — 
1 Pithecanthropus erectus (Klaatsch) . . . 9*68 
3 Spy-Neanderthal (Klaatsch) ..... 17*04 
51 Australians (Klaatsch and Buchner) . . . 20*2 
51 Tasmanians (Buchner) ...... 20*5 
